package templates

import (
	"crypto/sha256"
	"encoding/hex"
	"github.com/h2non/bimg"
	"log"
	"os"
)

func processFilename(input string) (src, dst string) {
	src = "resources/images/" + input
	hash := sha256.Sum256([]byte(input))
	dst = "www/images/" + hex.EncodeToString(hash[:])[:16] + ".avif"
	return src, dst
}

func convertToAvif(fileName string) string {
	src, dst := processFilename(fileName)

	_, err := os.Stat(dst)
	if err == nil {
		return dst[4:]
	}

	log.Printf("generating image: %s %s", src, dst)

	buffer, err := bimg.Read(src)
	if err != nil {
		log.Fatal(err)
	}

	options := bimg.Options{
		Type:    bimg.AVIF,
		Quality: 85,
	}
	newImage, err := bimg.NewImage(buffer).Process(options)

	if err != nil {
		log.Fatal(err)
	}

	if err := bimg.Write(dst, newImage); err != nil {
		log.Fatal(err)
	}

	return dst[4:]
}

templ AvifImage(srcPath, alt string) {
	<img src={ convertToAvif(srcPath) } alt={ alt }/>
}